Rain will gradually change to snow through the morning. The precipitation should be all snow by around lunch time. Roads will probably still be primarily wet, with temperatures around freezing.
Then, things go downhill in a hurry this afternoon.
The snow will fall heavily from roughly 1 pm until 11 pm tonight. That's when we will get most of our snow thump. 8-14" in 10 hours means that the snow will come down at the rate of 1-2" per hour.
With the falling snow, comes falling temperatures. We're near 35 this morning. Around freezing, or maybe a little below, by Noon, and near 20 by 5 pm. This will lead to a flash freeze during the afternoon. Anything that's wet will ice up.
Winds will be northeast at 10-15 mph through the morning, into the afternoon, then ramp up to 15-25 mph from the north by late in the day. This will cause blowing and drifting snow. Winds could approach 50 mph near the Lake Ontario shoreline with significant blowing and drifting snow. That's why there are blizzard warnings for northern Cayuga and Wayne counties, and points west. It will remain windy right through tonight, as the steady snow tapers to flurries after midnight.
Wind chills overnight will be 10-15 below zero. Wind chills will hover near zero through the day Thursday.
Fortunately, there won't be much additional snow around Thursday. The big story will be the wind and cold. High temperatures Thursday will only be in the mid and upper teens, with NNW winds of 15-30 mph.
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